Nature, Volume 452Sir Norman Lockyer Macmillan Journals Limited, 2008 - Electronic journals |
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Page 311
... peridotites from the ultraslow - spreading Gakkel ridge Arctic Ocean ) have very depleted 187Os / 188 Os ratios with model ages up to 2 billion years , implying the long - term preservation of refractory domains in the asthenospheric ...
... peridotites from the ultraslow - spreading Gakkel ridge Arctic Ocean ) have very depleted 187Os / 188 Os ratios with model ages up to 2 billion years , implying the long - term preservation of refractory domains in the asthenospheric ...
Page 312
... peridotites with large LOI ( 9-14 % ) . Most of the peridotite samples from both dredges are relatively fertile with similar ranges of bulk Al2O3 , 1.3-3.2 % in D70 and 1.5-3.1 % in PS66- 238 ( see Supplementary Table 1 ) . Both D70 and ...
... peridotites with large LOI ( 9-14 % ) . Most of the peridotite samples from both dredges are relatively fertile with similar ranges of bulk Al2O3 , 1.3-3.2 % in D70 and 1.5-3.1 % in PS66- 238 ( see Supplementary Table 1 ) . Both D70 and ...
Page 313
... peridotites are nteractions with metasomatic fluids or melts and seawater conta- nination . The potential for seawater contamination to increase the adiogenic Os isotopes of abyssal peridotites has been debated for some time23,31,32 ...
... peridotites are nteractions with metasomatic fluids or melts and seawater conta- nination . The potential for seawater contamination to increase the adiogenic Os isotopes of abyssal peridotites has been debated for some time23,31,32 ...
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